Telewest suffers National Outage- FixedTelewests Internet Service Status page indicates that they are suffering this morning.
This was originally intended to be a 2 hour outage for upgrades to both dial up and broadband services, but has got extended and turned into the current problem across the country. The fault has gone down as a top priorty to fix item, and currently has an estimated fix time of 4 hours.
Thanks to the eagle eyed forum user DaMuppet for spotting it.
The ticket has since closed as the fault is fixed, if you want you can see the fault ticket on Telewest's website.